Radiant air heater



Jan. 11 ,-l927.

, 0. A. COLBY RADIANT AIR HEATER Filed April 21, 1924 2 Sheets-Sheet 1INVENTOR Ora 14. C 0/!) ATTORNEY WITNESSES: 1 J/LM Jan. 11 1927.

o. A. COLBY RADIANT AIR HEATER Y 2 M M T a O 0 e T m m m .T S T 5. WA Aa M r Y S O B 2 4 2 9 1 2 n 4 r v w 1 4 d e 1 1 F p a 1 1 m 2 l |uWITNESSFSZ Patented Jan. 11, 1927.

UNITED STATES PATENT QEHQE.

ORA A. COLBY, OF IRWIN, PENNSYLVAl-TIA, .ASSIGNQR T5) VTTliElIllTG-HOUSEELECTRIC & MANUFACTURING CQMEANY, A COBIORATZQN G33 SYLVANIA.

RADIANT AIR HEATER.

Application filed April 21.,

My invention relates to electric heating de vices and particularly toelectric radiant air heaters.

One object of my invention is to provide a radiant heater of thereflector type hav ing a relatively simple and easily manufacturedsupporting and carrying; means.

Another object of my invention is to provide a. radiant reflector-typeheater having a. single means for pivotally supporting the reflector ona base, for clamping a heating; unit in its proper operative positionthere in and for providing); carrying means for the heater.

In practicing my invention. I provide a concave reflector with a wireguard and mount therein a radiant heating unit. An extended member ofarcuate form, is secur .d to the rear surface of the reflector and hasits upper end. formed to constitute a carryinp; handle and its lower endformed to constitute pivotal mounting means on a suitable base.

In a modified form of construction, a single extended arcuate member issecured to the rear surface of the reflector and has its lower endpivotally mounted on a base, while an intermediate pressed-out portionis eifcctive to clamp a heating unit in its proper operative position inan axial opening in the reflector, while the upper end thereof isforn'ied to constitute a carrying means for the heater.

In the drawings,

Figure l is a view. in side elevation. 01 a radiant heater embodying myinvention,

Fig. 2 is view in rear elevation thereof,

Fin. 3 is a view, in side elevation. of a modified form of radiantheater embodyinn; my invention,

Fig. 4; is a view, in rear elevation thereof,

Fig. 5 is an enlarged fra nentary view, in vertical section, of a porton of a radiant heater embodying my invention, and

6 is an enlarged view, partially in rear elevation and partially inlateral section, of the central portion of a device embodying myinvention.

Referring more particularly to Figs. 1 and of the drawi a radiantreflectortype heater ll con'xprises a reflector member 12, of concave orhowl-shape that has a re movable wire guard 13 mounted at the frontthereof. A plurality of substantially radially-extending wire members 14constitute a- Serial No. 7G'?,873.

part of the guard 13, the inner ends of which are suitably securedagainst an annultil ring 15. It plurality of the wire members have theirinner ends extended beyond the annular member indicated by the numerals16 and l? in order that they may constitute a means for holding; thewire ,e'uard M. inst the r- 'lector 12.

.r-r radiant and elongated heatino; unit 18 is mounted within theconcave surface of the reflector member 153 and is alined axiallythereof. extending through an axial opening (not shown). general. theheating; unit 18 comprises a suitable refractory support 19 and aresistor member 21 wound W thereon.

T he heating unit 18 is removahle from the refractory support in arearwardly direction. An annular and rearwardly extending! tuhularholder is suitably secured to the re flector 12 and screw-cap clampingmember 23 has screw-threaded on cement with the member 22, whereby an-tepgral and enlarged. intermediate portion of the heating unit l8 isclamped therehetween and the heating unit is held in substantially itsproper operative position relatively to the reflector.

A. rearwardly-extendiu51 metal shell 24 comprises a part of the heatingunit 18 and is effective to protect a pair of spaced contact terminals535 and 26 that are mounted at the rear end of the assembled unitaryheating: structure 18. As the'construction of the heatino; unit and ofthe mounting means therefor constitutes no part of my invention, it isnot illustrated or described in detail. It is, however, more pa cu. rlydisclosed and claimed in Patent No. 1, 3,638, issued JlQUSi) 1922. to F.Forshee and asned to the lVestingrhouse Electric Products Company.

A combined heater carrying a pivotal-supportin means comprises a member27 that is of extended arcuate form, having its upper end shaped toconstitute handle or carrying); member 28 and having its lower endformed to constitute a ,Xotal mounting pdtion 29 that is in operativeene'agement with a suitable 31. The ineinoer 27 is secured against theouter rear surface of the reflector 12 by a plur lity of rivets 32. 33,34: and the member 2'? h aving elongated opening); 36 therein in orderthat the member 22 and the rear portion of the heating unit 18 mayextend therethrough. An opening 3'? is provided at the upper portionthereof in order to permit of an operator inserting his lingers to carrythe heater, the handle portion 28 being bent outwardly and rear wardlyas is more particularly shown in Fig. 1 of the drawings.

Stifiening ribs 38 and 39 are provided at the upper handle portion topermit of making the member 2? out of relatively thin sheet metal, whilestill obtaining sullicient rigidity.

Integral and laterally-extending flange portions ll and d2 constitute apart of the lower end portion 29 to provide sutiicient rigidity and alsoto provide members through which a pivotal mounting means, comprising amachine bolt til, may extend. the bolt passing also through an integraltop portion of the base 31.

A nut stat holds the bolt 4?, in its proper operative position andpermits or obtaining suiiicient frictional engagement between theco-operating parts to hold the reflector and heating unit in any desiredangular position relatively to the base.

Referring more particularly to the modification illustrated in Figs. 3to (S. inclusive, of the drawings, a radiant retlector heater 15comprises a reflector member 12 of concave or bowl shape that hasmounted at the front thereof a removable wire guard 13, the guard 13comprising a plurality ot substantially radially extending wire members14, the inner ends of which are suitably se cured against the annularring 15. A piurality of wire members have their inner ends extendedbeyond the annular member 15, as indicated by the numerals 1G and 17 inorder that they may constitute a means for holding the wire guardagainst the retiector 12.

A radiant and elongated heating unit 18 is mounted within the concavesurtace ot the reflector 12 and is alined axially thereoi, extendingthrough an axial opening in that is illustrated more particularly in Ti5 ot the drawings.

The heating unit 18 there illustrated, com prises a suitable elongatedrefractory support 19 that has an enlarged rear end portion 17 providingan annular should r portion l8. A resistor member 21 of any suitabletype and construction is wound upon the it'orwardly extendingcylindrical nortion ot the heating unit 18.

A rearwardly extending tlange portion if) is provided at the rearsurface or the reticetor 12 immediately surrounding the opening toagainst which the shoulder portion it? of the refractory member lfl mayrest.

It is obvious that the heating unit 18 removable from the reflectormember in a rearwardly direction. A member 51, of elongated arcuateform, comprises a pressed metal member that is provided with apair ofside flanges and 53 that extend along substantially the entire length ofthe member 51. At the lower end the flanges 52 and 5 3, operativelyengage the reduced top portion 01 a base member 31 and are provided withopenings therethrough, through which a pivotal mounting meansconstituted by a suitable machine bolt 13 may extend. A wing nut l-lismounted on the outer end of the machine bolt 13 to suitably clamp thetlange portions and 5 3 against the sides of the member 31, in orderthat the member 51 may be held in any desired position angu arlyrelatively to the supporting base 31.

stituted by extensions of the flanged portions 1 53; and 53 that arerespectiyely provided with openings: 5e and so therethrough, that may beengaged by the thumb and linger of an operator to permit of carrying theentire heater.

ll'hile l have illustrated a difi'erent shape of upper end of the member51 from thatillustrated in Figs. 1 and of the drawings, either oi thesemodilicatimis may he employed, as may be suitable or desired.

The intermediate portion of the member 51 is provided with a rearwardlyextending integral portion .37 that comprises two parts. One part 58 is01 such internal diameter and gth as to receive the rear end portion 1-?the refractory member 1!) and to clamp 1 securely against the annularflange mem- 1' l9 by a shoulder portion 59. The shoulder portion 59connects the part 58 vith a second part (El that may be ot relativelysmall diameter. and of such axial length as to provide suliicient spacetor the inner ends of twin conductors (S2 and (33 ot a suitable supplycircuit cord (3-1 that extends into the member (31 through a bushing(3-5 ot' insulating ial that is located in an axial opening (3(3 in thepart 61.

The inner ends ot' the conductors 62 and 63 are secured to terminalplates (37 and (38, respectively. that are held against the rearsuri'ace of the part 1? o l the re tractor-y member 19 by co-operatingmachine screws (3!) and T1 extending therethrough and held byco-operating nuts The two ends ot the resistor member 21 may beelectrically connected to the terminal plates (57 and 68 by means of themachine bolts (39 and 71..

The device embodying my invention thus provides a single member t'orpivotally supporting a reflector and a heating unit on a base, forcarrying the entire device and for clamping the rearwardly removableheating unit in its proper operative position in the reflector. It may,if desired, serve also as a moui'iting means for a name plate 73 (seeFig. 2) that is suitably riveted thereto The single member constitutingthe carrying means, the pivotal supporting means and the heating unitclamping means may be easily and uickly manufactured and may beassembled in its proper operative position on the heater and may beeasily and quickly removed therefrom.

Various modifications and changes may be made without departing from thespirit and scope of the invention, and I desire therefore that only suchlimitations shall be placed thereon as are imposed by the prior art.

I claim as my invention:

1.. In an electric heater, the combination with a concave reflector, anda base, of an extended arcuate member, having its lower end pivotallymounted on said base and h aving the reflector secured theretointermediate its ends.

2. In an electric heater, the combination with a reflector, and a base,of an extended member having the reflector secured thereto intermediateits ends, having its lower end pivotally mounted on said base, andcomprising a. handle portion at its upper end for carrying said heater.

3. In an electric heater, the combination with a reflector, of acombined heater-carrying and heater-supporting member, of sul stantiallyarcuate form and directly secured to the rear surface of said reflector.

4-. In an electric heater, the combination with a reflector, of anelongated heater-carrying member directly secured to the rear surface ofsaid reflector and comprising means for pivotally supporting the same.

In an electric heater, the combination with a reflector, and a heatingunit. of a reflector-supporting and heatingunit-clamping member.

6- In an electric heater, the combination with a reflector, a heatingunit, and a base, of a single means for pivotally supporting saidreflector on said base and for clamping said heating unit in its properoperative position relatively to said reflector.

7. In an electric heater, the combination with a reflector having anaxial opening therethrough, and a heating unit extending into saidreflect-or through said opening, of a single member for permitting ofcarrying said reflector and for securing said heating unit in its properoperative position in said openlng.

8. In an electric heater, the combination with a reflector, a heatingunit, and a base, of a single member for pivotally supporting saidreflector on said base, for securing said heating unit in its properoperative position relatively to said reflector and for carrying saidheater.

9. In an electric heater, the combination with a reflector having anaxial opening therethrough, a heating unit extending into said reflectorthrough said opening and rearwardly removable therefrom, and a base, ofa single member secured to the rear surface of the reflector forpivotally supporting it on the base, and for clamping the heating unitagainst the reflector.

10. In an electric heater, the combination with a reflector having anaxial opening therethrough, a heating unit extending into rid reflectorthrough said opening and rearwardly removable therefrom, and a base, ofa single member secured to the rear surface of the reflector forpivotally supporting it on the base, for clamping the heating unitagainst the reflector and for constituting a carrying means for saidheater.

11.. In an electric heater, the combination with a reflector, a heatingunit, and a base, of a. single elongated member having means at itslower end for a pivotal mounting on the base, and having also means forsecuring said heating unit in its proper operative position in saidreflector when secured to the rear siu'facethereof.

12. A. reflector heater comprising, a base having an upright por ion, adished heat reflector, and a bracket on the back of said reflector anddished less than said reflect-or to contact only the deepest portion ofsaid reflector and one end thereof formed with a handle bent outwardfrom said reflector to keep the handle cool and the other end thereofhinged to said upright portion.

A reflector heater comprising, a base having an upright portion, adished heat reflector, a dished bracket on the back of said reflectorand one end thereof formed with a handle and the other end thereofformed with a pair of ears straddling said upright portion, a hinge pinthrough said ears and through said upright portion, and means on saidhinge pin to adjust the friction between said ears and said. uprightportion.

In testimony whereof, I have hereunto subscribed my name this 27th dayof March ORA A. COLBY.

